Question

4\(\dfrac{1}{5}\) + 25% - 3\(\dfrac{7}{2}\) + (\(\dfrac{9}{10}\) - 1,25)

Answer 1

`4 1/5 + 25% - 3 7/2 + (9/10-1,25)`

`= 21/5 + 1/4 - 13/2 + 9/10 - 5/4`

`=(21/5-13/2+9/10)+(1/4-5/4)`

`=(-7)/5 - 1`

`= (-12)/5`

Answer 2

\(4\dfrac{1}{5}+25\%+3\dfrac{7}{2}+\left(\dfrac{9}{10}-1,25\right)\)

\(\dfrac{21}{5}+\dfrac{1}{4}-\dfrac{13}{2}+\left(\dfrac{9}{10}-\dfrac{5}{4}\right)\)

\(=\dfrac{21}{5}+\dfrac{1}{4}-\dfrac{13}{2}+\dfrac{-7}{20}\)

\(=\dfrac{84}{20}+\dfrac{5}{20}-\dfrac{130}{20}+\dfrac{-7}{20}\)

\(=\dfrac{84+5-130+\left(-7\right)}{20}=\dfrac{-48}{20}=\dfrac{-12}{5}\)